Use query params to pre-filter Chromium releases

[codebytere]

When

roller/src/utils/get-chromium-tags.ts

Lines 33 to 35 in f71a19a

	export function getChromiumReleases(): Promise<Release[]> {
	return get('https://chromiumdash.appspot.com/fetch_releases').then(s => JSON.parse(s));
	}

was originally written, we weren't aware we could pass query params to specify e.g. the number of releases, the platforms, or the release channels. We should scope that down in the fetch call, at least by channel=Canary and whatever others make sense.